Examples made by the One Show of 'nudge' were collection boxes that were transparent with notes in them. This encouraged people to put more in the box. A stair case to a tube station was made to look like piano keys to encourage people to use the stairs rather than the escalator that ran along side it..........
Also, They put out free food in a public place. The same number of cakes on one plate as there was fruit on another plate. It goes without saying that the cakes disappeared and were 40% more popular.
Repeating the experiment they placed a mirror ( the nudge) at the table so that people could see themselves as they looked at the fruit and cakes on the table. The exact opposite happened. 40% picked the fruit. Effectively nudging people into eating healthier food.
Amazing....